Electrical Connection - Samson TROVIS 6495 Series Mounting And Operating Instructions

Electrical connection

4 Electrical connection
!
Risk of electric shock!
When installing electric cables, you are re-
quired to observe the regulations governing
electrical power plant installation in the
country where the controller is to be in-
stalled.
Installation notes
• Install the power supply lines and the sig-
nal lines separately! Do not install them
parallel to each other! To improve noise
immunity, observe a minimum distance of
10 cm between the power line and the
measuring input line. The lines for the dig-
ital signals (bus lines) as well as the ana-
log signal lines (sensor lines, analog in-
puts and outputs) must also be routed
using separate cables.
• To avoid measurement errors or other dis-
turbances, use shielded cables for the an-
alog and binary signal lines and bus
lines. Ground the shield at one end, either
at the controller inlet or at the control cab-
inet outlet, using the largest possible
cross-section. Connect the central ground-
ing point and the PE grounding conductor
with a cable ≥ 10 mm² using the shortest
route.
• Inductances in the control cabinet, e.g.
contactor coils, are to be equipped with
suitable interference suppressors (RC ele-
ments).
• Control cabinet elements with high field
strength, e.g. transformers or frequency
converters, are to be shielded with sepa-
8
EB 6495-2 EN
rators providing a good ground connec-
tion.
The controller has screw terminals for
1.5 mm² wires (0.5 to 1.5 mm² wire
cross-section).
The lines are connected to the terminal strips
1 to 4 as shown in the following connection
diagrams 2a to 2c.
Transmitter supply
The controller has a supply output to power
a maximum of four two-wire transmitters
(21 V DC, 90 mA).
Resistance thermometer
The analog inputs AI1 to AI4 are designed
for the connection of resistance thermome-
ters Pt 100 and Pt 1000 in a three-wire cir-
cuit. The resistance of each connection lead
must be the same and not exceed 15 Ω.
Lead calibration is not necessary.
Resistance thermometers can also be con-
nected in two-wire circuits. In this case,
connect a jumper between the controller ter-
minals. Take into account that the lead resis-
tance may reach several ohms over long
distances, causing the measured value to be
considerably distorted. This measured value
can be balanced out using a correction
value (configuration item
I.1.4/I.2.4/I.3.4/I.4.4 Input signal
increase/decrease, see section 15.2).